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Ti-Zr-Cu-Ni-Co-Mo釬料的特性及其釬焊γ-TiAl接頭的研究
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華南理工大學(xué) 國家金屬材料近凈成形工程技術(shù)研究中心,華南理工大學(xué) 國家金屬材料近凈成形工程技術(shù)研究中心,華南理工大學(xué) 國家金屬材料近凈成形工程技術(shù)研究中心,華南理工大學(xué) 國家金屬材料近凈成形工程技術(shù)研究中心,華南理工大學(xué) 國家金屬材料近凈成形工程技術(shù)研究中心

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國防軍品配套規(guī)劃研制項目(XZJQ-B1120680),先進焊接與連接國家重點實驗室開放課題(重點項目)(AWJ-Z14-02)


Research on the characterization of Ti-Zr-Cu-Ni-Co-Mo filler and the brazed γ-TiAl joint
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National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology

Fund Project:

the Research Project of Special Furnishment and Part (Grant No. XZJQ-B1120680), the Research Foundation of State Key Laboratory of Advanced Welding and Joining (Grant No. AWJ-Z14-02).

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    摘要:

    采用SEM、EDS、XRD、TEM、DSC等對晶態(tài)和快速凝固Ti-25.65Zr-13.3Cu-12.35Ni-3Co-2Mo釬料的顯微組織、熔化特性及相應(yīng)釬焊γ-TiAl接頭的界面顯微組織進行了分析,并檢測了釬焊接頭的抗拉強度。結(jié)果表明:快速凝固Ti-Zr-Cu-Ni-Co-Mo釬料呈非晶態(tài),其熔化區(qū)間比相應(yīng)晶態(tài)的明顯窄,且在γ-TiAl表面具有良好的潤濕鋪展性能。晶態(tài)和非晶態(tài)兩種釬料的釬焊接頭均包含界面反應(yīng)層Ⅰ和中心釬焊層Ⅱ;當(dāng)釬焊時間為10min、釬焊溫度為925℃~1050℃時,隨釬焊溫度的升高,兩種釬料的接頭的抗拉強度均先增大后減小,且非晶釬料釬焊接頭具有更高的抗拉強度。采用非晶釬料經(jīng)1000℃釬焊10min獲得的接頭的抗拉強度最大,為302MPa。

    Abstract:

    The microstructure and melting characteristic of the Ti-25.65Zr-13.3Cu-12.35Ni-3Co-2Mo fillers prepared via casting and rapid solidification technology, as well as the interfacial microstructure of the brazed γ-TiAl joint were analyzed by SEM, EDS, XRD, TEM and DSC. The tensile strength of the brazed joint was also evaluated. The results show that the Ti-25.65Zr-13.3Cu-12.35Ni-3Co-2Mo filler prepared by rapid solidification is fully amorphous. The amorphous filler shows thinner melting temperature interval and better wettability to γ-TiAl compared with the crystalline filler. The joints brazed with crystalline and amorphous fillers are both composed of a central brazed layer II between two interfacial reaction layers I, and the tensile strength first increases and then decreases in the brazing temperature range of 925 - 1050 °C for 10 min. However, the tensile strength of the joints brazed with the amorphous filler is always much higher than that with the crystalline filler, and it obtains a maximum value of 302 MPa at temperature of 1000 °C with a holding time of 10 min.

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李力,李小強,李志鋒,朱德智,屈盛官. Ti-Zr-Cu-Ni-Co-Mo釬料的特性及其釬焊γ-TiAl接頭的研究[J].稀有金屬材料與工程,2017,46(8):2214~2219.[Li Li, Li Xiaoqiang, Li Zhifeng, Zhu Dezhi, Qu Shengguan. Research on the characterization of Ti-Zr-Cu-Ni-Co-Mo filler and the brazed γ-TiAl joint[J]. Rare Metal Materials and Engineering,2017,46(8):2214~2219.]
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  • 收稿日期:2015-04-21
  • 最后修改日期:2015-05-05
  • 錄用日期:2015-05-15
  • 在線發(fā)布日期: 2017-11-16
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